\documentclass{standalone}
\usepackage[T1]{fontenc}
\usepackage{mathptmx}
\usepackage{pst-mirror}
\begin{document}
\begin{pspicture}(-5,-5)(5,5)
\pscircle[linecolor=blue!50]{!5 2 sqrt div}
\psset{Rayon=5}
\pstSphereImage[normale=0 0,scale=3](30,0,0){xc.eps}
\end{pspicture}



\begin{pspicture}(-5,-5)(5,5)
\pscircle[linecolor=blue!50]{!5 2 sqrt div}
\psset{Rayon=5}
\pstSphereImage[normale=0 0,scale=5](30,10,0){tiger-c.eps}
\end{pspicture}


\end{document}